全文搜索-Lucene

package com.lucene.helloworld;

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriter.MaxFieldLength;
import org.apache.lucene.queryParser.MultiFieldQueryParser;
import org.apache.lucene.queryParser.QueryParser;
import org.apache.lucene.search.Filter;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.TopDocs;
import org.junit.Test;

import com.lucene.utils.LuceneUtils;

public class HelloWorld {
	private String filePath="F:\\tasks\\workspace2\\LucenePro\\luceneDatasource\\jincm_中国.txt";
	private String indexPath="F:\\tasks\\workspace2\\LucenePro\\luceneIndex";
	private Analyzer analyzer=new StandardAnalyzer();
	@Test
	public void createIndex() throws Exception{
		Document doc=LuceneUtils.file2Document(filePath);
		IndexWriter indexWriter=new IndexWriter(indexPath, analyzer,true,MaxFieldLength.LIMITED);
		indexWriter.addDocument(doc);
		indexWriter.close();
	}

	@Test
	public void search()throws Exception {
		String queryString="jincm";
		String[] fields={"name","content"};
		QueryParser queryParser=new MultiFieldQueryParser(fields, analyzer);
		Query query=queryParser.parse(queryString);
		IndexSearcher indexSearcher=new IndexSearcher(indexPath);
		Filter filter=null;
		TopDocs topDocs=indexSearcher.search(query,filter,10000);
		System.out.println("总共有【" + topDocs.totalHits + "】条匹配结果");
		for(ScoreDoc scoreDoc:topDocs.scoreDocs){
			int docIndex=scoreDoc.doc;
			Document doc=indexSearcher.doc(docIndex);
			System.out.println("<------------------------------");
			System.out.println(doc.get("name"));
			System.out.println(doc.get("content"));
			System.out.println(doc.get("size"));
			System.out.println(doc.get("path"));
			System.out.println("------------------------------>");
		}
		
	}
}

package com.lucene.utils;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStreamReader;

import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.Field.Index;
import org.apache.lucene.document.Field.Store;
import org.apache.lucene.document.NumberTools;

public class LuceneUtils {
	public static Document file2Document(String filePath){
		File file=new File(filePath);
		Document doc=new Document();
		doc.add(new Field("name", file.getName(), Store.YES, Index.ANALYZED));
		doc.add(new Field("content",readFileContent(file), Store.YES, Index.ANALYZED));
		doc.add(new Field("size", NumberTools.longToString(file.length()), Store.YES, Index.NOT_ANALYZED));
		doc.add(new Field("path", file.getAbsolutePath(), Store.YES, Index.NOT_ANALYZED));
		return doc;
	}
	public static String readFileContent(File file){
		try {
			BufferedReader reader=new BufferedReader(new InputStreamReader(new FileInputStream(file)));
			StringBuffer content=new StringBuffer();
			for(String line=null;(line=reader.readLine())!=null;){
				content.append(line);
			}
			return content.toString();
		} catch (Exception e) {
			// TODO Auto-generated catch block
			throw new RuntimeException();
		}
	}
}